Level.



PATENTED FEB. 13, 1906.

T. ALEXANDER.

LEVEL.

APPLIOATION FILED 1114.11.25

I 31 manta z ffllexaiad an a s'rnrns ATENT ,rrion.

' TONY ALEXANDER, OF BRooKHAvEN, MISSISSIPPI.

LEVEL.

Specification of Letters Patent.

Patented Feb. 13, 1906.

Application fi1ad March 25,1905. Serial No. 252,076.

To all whom) it may concern.-

Be it known that I, TONY ALEXANDER, a citizen pf the United States,residing at Brookhaven, in the county of Lincoln and State .of

' Mississippi, have invented certain new and useful mprovements inLevels, of which the following is 'a specification This inventionrelates to instruments designed chiefly for ascertaining horizontalitythe merits thereof and also to acquire a knowl-' edge of the details ofconstruction of the means for effecting the result reference is to behad to the following description and accompanying drawings, in whichFigure 1 isa perspective view of a hollow globe or sphere embodying theinvention.

Fig. 2 is a top lan view thereof. Fig. 3 is a vertical centra section;Fig. 4 is a view similar to Fig. 3 of a modification.

Corresponding and like parts are referred to in the followin descriptionand indicated in all the views of the drawings by the same referencecharacters. 7

The globe or sphere 1 is hollow and preferably formed of glass and isprovided with a neck 2 and base 3, the latter bein preferably hollowupon its lower side to hol the neck 2 a short distance from the surfaceof the support, beam, or frame to which the globular ody may beattached. The globe .1 is filled with a liquid, such as alcohol orspirits, with the exception of a minute space to provide the accustomedair-bubble 4 for indicating the level or other determinate position. A

stopper 5 is fitted within the neck'2 and pre-'.

vents escape of the li uid and may be adjusted to vary the size 0 theair-bubble as may be required by changes in temperature orby anypossible loss of the li uid from any cause The stopper 5 may be 0 anymaterial, and

its end projects beyond the neck 2 a distance I to admit of it beingconveniently gripped when it is required to adjust the air-bubble tomeet existing conditions. The projectin end of the stopper extends intothe space 0 the hollow base 3 and is held out of contact thereby withthe surface 6, to which the level device may be attached.

At determinate points in the surfaceof the globe or sphere indicia areprovided, as indicated at 7. Each indice consists of a cross and aseries of concentric circles, the centers of the cross and circlescoincidin The indicia are pressed in the surface o the lobular body andare preferably formed in t e inner surface, as shown most clearly inFig. 3, althou h, as indicated in Fig. 4, they may be resse or otherwiseformed in the outer sur- By having the marks pressed into the innersurface of the globe t e concavity is materially augmented and thesensitiveness of the level, proportionately increased. By reason of thespherical shape of the body the air-bubble presents a rounded appearanceand coincides with one or the other of theconcentric circles, so as toaccurately indicate the desired position. The indicia are located at thetop and sides for designating perpendicular and horizontal lines and maybe differently positioned if angles between the vertical and thehorizontal are tobe determined. This is 'an'obvious application and maybe readily comprehended.

In the modification shown in Fig. each indice has a contrasting colorfrom the body centric circles are formed throu h the colored portion, soas to enable the hub le to be more readily located.

Having thus described .the invention, what is claime as new is- 1.; In aleveling device, a hollow body of globular or spherical form filled witha liquid with the exception of a minute space forming an air-bubble, andhaving indicia at. different points in its surface, each indiceconsisting of aseries of concentric circles.

2. In a leveling device, ahollow body of globular or spherical formfilled with a liquidwith the exception of a minute space forming anair-bubble, and having indicia at different points in its surface, eachindice consisting of.

of theglobe orsphere, and the cross and cona series ofconcentriccircles, and a cross intersecting the lines of the circles and thecenters, of the cross and circles coinciding. 3. In alev'elin device,ahollo'w body of spherical or glob ar. form containing a liquid and anair-bubble, and provided withiindicia inner 'surface'to'increase. theconcavity and re at diflerent points in its surface and formedcontaining liquid and an air-bubble.

'W'ifih a neck and a base, said base being hol- In testimonymhereof Iaffix my signature low upon its under side all'lld thei neck adapted inpresence of two witnesses.

to receive a stopper, t e en of which is 7 adapted to project into thespace of said hol- TON1 ALEXANDER low base. v Witnesses:

4. In a leveling, device, a hollow-bodypf A. B. LACEY,

" globular form having indicia pressed into its L. H. JOHNSTON.

